Abrasive wheel



( No Model.)

A. H. ROLPE.

ABRASIVE WHEEL.

No. 277,062. x; Patented May 8, 1883.

N. PEYERS. Phalo Llllmgnpher. wasm mn, DC.

UNITED I STATES PATENT OFFICE.

ABRASIVE WHEEL.

SPECIFICATION formingpart of Letters Patent No. 277,062, dated May 8, 1883.

Application filed February 2, 1883. (No model.)

To all whom it may concern Be it known that I, ALBERT H. ROLFE, 0t Baldwinsville, county of Worcester, State of Massachusetts, have invented an Improvement in Abrasive Wheels, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

Thisinvention relates to thatclass ofabrasive wheel which is covered with sand-paper, and is employed for abrading or grinding leather, wood, &c.

In this my invention I have taken a flanged wheel or pulley, and in the annular groove in its periphery, between its flanges, I have stretched an endless india-rubber band, thus forming ayielding bed. erably stretch a felt or cloth band to protect the rubber and serve as a seat for the abrasive paper or cloth strip,which Ishall call the facestrip. The wheel or hub is provided with a cross-groove in which is placed a clamp-which engages the two ends of the abrasive or face strip, and the clamp is then moved toward the center of the said wheel or pulley by a suitable screw or bolt, stretching the abrasive or face strip from its ends about the wheel or pulley.

Fignrel represents in side elevation awheel or pulley containing my improvements; Fig. 2, a partial cross-section of the same on the dotted line a; Fig. 3, a partial section onthe dotted line x Fig. at is a detail showing the abrasive or face strip removed, and Fig 5 a modification to be referred to.

Thewheel or pulley A, of any suitable size or material,-preterably cast metal, has at each side flanges a a to receive between them the endless india-rubber belt or band which forms the bed B, a portion of the said belt being drawn down into a cross groove or space in the wheel A, as shown in Figs. 1 to 3, by a bar, a, through which are passed screws 2, the lower ends of which are screwed into the part a of the depressed portion of the said wheel. The india-rubber bed having been applied, 1 then preferably stretch over it a strip of felt or cloth, I), and over it I apply the abrasive or face strip 0, preferably of paper or cloth coated with glass, sand, emery, or other similar material. The ends of the strip 0, notched, as at On this bed I pref- 0' passing over the said bolts.

0', Fig. 4, are placed between the two plates orjaws d 0, when the said plates orjaws are elevated and in their dotted-line position, Fig. 1, after which, by means of suitable bolts or screws, the said jaws-are made to clamp the ends of the face-strip 0 between them, and the said jaws or plates are drawn down into the space or groove across the wheel A and below the surface of the main portion of the said face-strip, as shown in Fig. l in full lines, thus drawing the face-strip closely about the wheel by a direct pull upon the ends of the said strip.

In Figs. 1 and 3 the plate c has bolts or screws f attached to it and extended loosely down through the plate d, thence through springs g and the portion 00 where nut-s hare applied to them. When the nuts are turned nearly off the ends of the bolts or screws the springs g, acting on the plate d,]ift it and the plate a nearly flush with the periphery of the bed B, after which any further movement of the boltsf outward will cause the plate 0 to be moved away from the plate d, thus leaving a space or opening into which the ends of the face-strip 0 may be'ea-sily'inserted, the notches After this, by turning the nuts it in the chamber to draw the bolts toward the center of the wheel A, the plates 0 d will first be clamped upon the ends of the face-strip, and as the plates 6 (I move with the bolts the ends of the strip 0 will be clamped with a force depending upon the force of the compressed springs g, and the said strip 0, drawn upon at its ends,will be fitted closely and smoothly about the wheel A or its elastic bed B.

ln'Fig. 5 I have shown a modification wherein screws are employed instead of bolts, as in Figs. 1 and 3, to move the plates d 0.

By employing screws I may use a screwdriver and operate from the outside of the wheel rather than at the inner side, as when the nuts are employed as in Figs. 1 and 3.

I claim- I 1. The wheel or pulley provided with the flanges a and a cross groove or space, and the endless belt or band to constitute a bed, combined with means to draw and hold the said belt or band stretched about the said wheel or pulley, substantially as described.

2. The wheel or pulley provided with the it v cross groove or depression, and an endless india-rubber band extending about the same to constitute a bed, and independent screws 2, or equivalents, to secure a bight of the said band down into the said groove, combined with the abrasive strip, jaws, or plates, and other bolts or screws, f, to operate them, and springs to'act upon thejaws or plates, whereby the ends of the said strip, placed between the said jaws, as described, may be drawn and fitted to said wheel or pulley by the movement of the said bolts or screws,while the screws 2 remain unchanged, substantially as set forth.

3. The plates e d to grasp the abrasive or free strip at its ends, as described, and springs g to-support, and bolts or screws to operate, the said plates, combined with the wheel or pulley A, substantially as described.

4:. The wheel or pulley A, its elastic or in.- dia-rubber bed composed of an endless belt or band stretched thereon, combined with the plates or jaws d e and bolts or screws tooperate them, and with an abrasive or face strip engaged at its ends, as described, between the said plates or jaws, whereby the said strip is drawn from its ends closely about the elastic bed on the said pulley, substantially as described.

5. The wheel or pulley provided with the flanges a and a cross groove or space, andthe endless belt or band to constitute the bed, and

the felt or cloth covering to protect the said bed and serve as a seat. for theabrasive paper or cloth strip, combined with means to draw and hold the said belt or band and protectingstrip stretched about the said wheel or pulley,

substantially as described.

6. The'wheel or pulley provided with the cross groove or depression, and an endless india-rubber band and strip of felt or cloth or equivalent material extended about the said wheel or pulley, combined with screws or equivalent means to hold a portion of the said band and strip of felt down into the said groove, substantially as described.

7. The wheel or pulley a, its elastic indiarubber bed composed of an endless belt or band, and a protecting belt or band stretched thereon, combined with the plates or jaws d c, and bolts or screws to operate them, and with an abrasive or face strip engaged at its ends, asdescribed, between the said plates or jaws, whereby the said strip is drawn from its ends closely about the elastic bed on the said pulley, substantially as described.

In testimony whereof I have signed my name to thisspecificationin the presence of two subscribing witnesses.

. ALBERT H. ROLFE.

Witnesses:

. E. B. TAYLOR,

CARRIE E. TAYLOR. 

